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We study the phase transition from quark-gluon plasma to hadrons in the early universe in the context of non-equilibrium thermodynamics. According to the standard model of cosmology, a phase transition associated with chiral symmetry…

General Relativity and Quantum Cosmology · Physics 2015-06-19 M. Khodadi , H. R. Sepangi

The primordial nucleosinthesys of the element can be influenced by the transitions of phase that take place after the Big Bang, such as the QCD transition. In order to study the effect of this phase transition, in this work we compute the…

High Energy Physics - Phenomenology · Physics 2015-06-18 G. L. Guardo , V. Greco , M. Ruggieri

We performed numerical simulations with the PLUTO code in order to analyze the non-linear behavior of the Kelvin-Helmholtz instability in non-magnetized relativistic fluids. The relevance of the instability at the cosmological QCD phase…

Cosmology and Nongalactic Astrophysics · Physics 2018-04-11 V. R. C. Mourão Roque , G. Lugones

We perform numerical simulations of gravitational waves (GWs) induced by hydrodynamic and hydromagnetic turbulent sources that might have been present at cosmological quantum chromodynamic (QCD) phase transitions. For turbulent energies of…

Cosmology and Nongalactic Astrophysics · Physics 2021-08-17 Axel Brandenburg , Emma Clarke , Yutong He , Tina Kahniashvili

The study of cosmic phase transitions are of central interest in modern cosmology. In the standard model of cosmology the Universe begins in a very hot state, right after at the end of inflation via the process of reheating/preheating, and…

High Energy Physics - Phenomenology · Physics 2019-12-20 Anupam Mazumdar , Graham White

The physics of the 20th Century is governed by two pillars, Einstein's relativity principle and the quantum principle. At the beginning of the 21st Century, it becomes clear that there exist the smallest units of matter, such as electrons,…

Cosmology and Nongalactic Astrophysics · Physics 2017-01-16 W-Y. Pauchy Hwang , Sang Pyo Kim

We determine the nature of the QCD transition using lattice calculations for physical quark masses. Susceptibilities are extrapolated to vanishing lattice spacing for three physical volumes, the smallest and largest of which differ by a…

High Energy Physics - Lattice · Physics 2009-07-09 Y. Aoki , G. Endrodi , Z. Fodor , S. D. Katz , K. K. Szabo

We perform direct numerical simulations of magnetohydrodynamic turbulence in the early universe and numerically compute the resulting stochastic background of gravitational waves and relic magnetic fields. These simulations do not make the…

Cosmology and Nongalactic Astrophysics · Physics 2021-07-15 Alberto Roper Pol , Sayan Mandal , Axel Brandenburg , Tina Kahniashvili , Arthur Kosowsky

We investigate the gravitation waves produced from QCD and electroweak phase transitions in the early universe by using a 5-dimension holographic QCD model and a holographic technicolor model. The dynamical holographic QCD model is to…

High Energy Physics - Phenomenology · Physics 2018-06-06 Yidian Chen , Mei Huang , Qi-Shu Yan

Using the quantum chromodynamics (QCD) equation of state (EoS) from lattice calculations we investigate effects from QCD on primordial gravitational waves (PGWs) produced during the inflationary era. We also consider different cases for…

High Energy Physics - Phenomenology · Physics 2019-05-23 Fazlollah Hajkarim , Jürgen Schaffner-Bielich , Stephan Wystub , Mandy M. Wygas

A QCD phase transition in the early universe could have left inhomogeneities in the baryon to photon ratio and in isospin that might have affected nucleosynthesis later on. At very high temperature QCD plasma can be described by…

Astrophysics · Physics 2007-05-23 Joseph I Kapusta

Heavy-ion collisions are well described by a dynamical evolution with a long hydrodynamical phase. In this phase the properties of the strongly coupled quark-gluon plasma are reflected in the equation of state (EoS) and the transport…

Nuclear Theory · Physics 2018-12-06 A. Dubla , S. Masciocchi , J. M. Pawlowski , B. Schenke , C. Shen , J. Stachel

Based on hot big bang theory, the cosmological matter is conjectured to undergo QCD phase transition(s) to hadrons, when the universe was about $1-10 \mu$s old. In the present work, we study the quark-hadron phase transition, by taking into…

Cosmology and Nongalactic Astrophysics · Physics 2012-04-26 A. Tawfik , T. Harko

The early universe is believed to have undergone a QCD phase transition to hadrons at about $10\mu s$ after the big bang. We study such a transition in the context of the non-detailed balance Horava-Lifshitz theory by investigating the…

General Relativity and Quantum Cosmology · Physics 2015-06-12 F. Kheyri , M. Khodadi , H. R. Sepangi

We investigate a new mechanism for the cosmological QCD phase transition: inhomogeneous nucleation. The primordial temperature fluctuations, measured to be $\delta T/T \sim 10^{-5}$, are larger than the tiny temperature interval, in which…

High Energy Physics - Phenomenology · Physics 2009-10-31 J. Ignatius , Dominik J. Schwarz

The evolution of the Universe is the ultimate laboratory to study fundamental physics across energy scales that span about 25 orders of magnitude: from the grand unification scale through particle and nuclear physics scales down to the…

High Energy Physics - Phenomenology · Physics 2008-11-26 D. Boyanovsky , H. J. de Vega , D. J. Schwarz

Quark-gluon plasmas formed in heavy ion collisions at high energies are well described by ideal classical fluid equations with nearly zero viscosity. It is believed that a similar fluid permeated the entire universe at about three…

Quantum Physics · Physics 2017-02-28 Mark Davidson

The time evolution of cosmological parameters in early Universe at the deconfinement transition is studied by an equation of state (EoS) which takes into account the finite baryon density and the background magnetic field. The non…

High Energy Physics - Phenomenology · Physics 2015-09-30 Paolo Castorina , Vincenzo Greco , Salvatore Plumari

In the Beam Energy Scan phase II (BES-II) experiments at RHIC STAR, the quark-gluon plasma (QGP) produced with changing collision energies may probe different regions of the QCD phase diagram. Correspondingly, studying the transport…

High Energy Physics - Phenomenology · Physics 2025-12-01 Wei-be He , Guo-yun Shao , Chong-long Xie , Ren-xin Xu

Gravitational waves (GWs) generated by a first-order phase transition at the electroweak scale are detectable by future space-based detectors like LISA. The lifetime of the resulting shock waves plays an important role in determining the…

General Relativity and Quantum Cosmology · Physics 2024-11-14 Jani Dahl , Mark Hindmarsh , Kari Rummukainen , David Weir
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